Suspect Built Arsenal by Mail Order, Police Say

By

Ben Lefebvre And

Caroline Porter

Updated July 21, 2012 7:13 p.m. ET

AURORA, Colo.—The alleged gunman behind the movie-house shooting that killed 12 people and wounded 58 others Friday had a "high volume of deliveries" by mail to his home and school over the past four months as he built an arsenal of weapons and explosives to conduct attacks, authorities said Saturday.

"We think this begins to explain how he got his hands on all of the magazines and ammunition" Aurora Police...